Table 3.

CDSS availability (in yellow) and usage (in green) in solo primary care practices with physician owners or physician group owners when the reporting location is entirely electronic records based (n=31 833 providers weighted by physician weight of National Ambulatory Medical Care Survey 2015)

CDSS	Yes, used routinely (%) (1)	Yes, but not used routinely (%) (2)	Yes, but turned off/not used (%) (3)	Used (%) (1+2)	Availability (%) (1+2+3)
EREMIND	89.3	4.4	~	93.7*	93.7*
EIDPT	74.5	2.4	3.6	76.9*	80.5*
EWARN	88.4	3.5	~	91.9*	91.9*
EMEDALG	97.9	2.1	~	100	100
EMEDID	96.6	2.1	~	98.7	98.7
ECPOE	88.6	8.5	0.9	97.1	98.0
EGRAPH	56.1	12.4	3.3	68.5*	71.8*

~ indicates no value was reported in the dataset.

*P<0.001 by proportion tests between solo and non-solo practices that are entirely electronic medical record/electronic health record based for each variable. Many measures in solo practices (eg, routine use and availability) are significantly lower than the measures in non-solo practices.

CDSS, clinical decision support system.